Magazine lead pencil



F. E. MAYOL MAGAZINE LEAD PENCIL Filed Sept. 19, 1927 Nov. 20, 1928.

Patented Nov. 20, 1928. I

UNITEDQSTATES FBANKE. MAYOL, OF FBANCONIA, NEW HAMPSHIRE.

MAGAZINE LEAD PENCIL.

' Application filed September My invention relates to mechanical leadpencils of the lead-propelling type, and its chief object is to providea writing pencil of this class which shall be strong andv durable aswell as positive in its operation, and yet be of such inexpensiveconstruction as to ermit of a ver low cost of manufacture, tiierebymaking it possible to place the pencil within the price reach of schoolchildren and others who cannot afford to pay the price now required tobuy any of the mechanical pencils of dependable mechanism now on themarket.

Another object of my invention-is to provide a magazine pencil whichmay, without any mechanical change of construction other than increasingthe dimensions of its several parts, be adapted to the use of crayonswhich have a wax base or body of the type now in general use inschool-rooms and studios. My invention will provide a very satisfactorycrayon holder, with the added feature of feeding the crayon through thewriting point as needed.

Still another object of my invention is to provide a breech loadingmagazine pencil, thereby securing to it the obvious advantages thataccrue to inserting the writing lead at the breech, as opposed to themuzzle loading type of magazine pencil which requires thatpracticallythe entire length of writing lead be forcedinwardly through the writingpoint before the pencil is ready for use, which frequently results insoiling the hands, in breaking the lead before it is fully inserted, andin clogging the magazine. In my pencil the lead is dro ped lengthwiseinto the magazine through a lireechway, makingit unnecessary to soil thehands, and practically eliminating the possibility of breaking the leador of clogging the magazine. Also, in my pencil, it is not necessary tooperate the propelling mechanism reversely to its inwardmost limit toclear the lead chamber before the lead can be inserted, which is anecessary operation with all muzzle-loading mechanical pencils.

With these objects in view, my invention consists in the combinationsand arrangements of parts hereinafter described and claimed. v

The invention is illustrated in the accompanying drawing, which forms apart of this specification, and in which,

Fig. 1 is a general view with sections broken or cut away to expose theseveral parts.

Fig. 2 is a plan of the breech end.

Fig. 3 is a side view plan of the plunger.

19. 1927. Serial No. 220,292.

Fig. 4 is the forward or mouth end of plunger.

Fig. 5 is'a cross section of the propeller tube imd barrel taken on theline 3030 of Fig. 6 is a cross section of the assembled mem ers of thepropelling mechanism taken on the line O0 of Fig. 1.

Fig. 7 is the propeller tube as it would appear 1from the side reverseto that shown in Fig. 8 is a plan view of the forward end of thepropeller tube.

Fig. 9 is a plan view of the breech end of the propeller tube.

' Fig. 10 is the barrel as it would appear from the side reverse to thatshown in Fig. 1.

Similar numerals refer to similar parts throughout the several views.

M y pencil comprises a barrel 1, said barrel having a longitudinal slot2 extending along one side and a multiplicity of equidistant transverseperforations 3 extending serially along its other side, the barrelterminating at the forward end in a tapered Writing tip 5, said writingtip having opposite longitudinal slots 6 which divide the writing tipinto opposed slightly flexible sections or grippers 7, an out-turnedflange 4 being placed between the writing tip and the forward end of thebarrel proper; a propeller tube 8, said propeller tube having alongitudinal slot 9 extending along one side and a plurality. ofequidistant perforations 10 extending serially along its other side, thepropeller tube terminating at its forward end in an outturned flange 11,and at its rear end in a flange cap 12, said flange cap being tappedthrough its center to provide a breechway 13; a tubular plunger 14having, as a continuation of one of its sides, a flexible shank 15, saidflexible shank terminating rearwardly in a detent 16, said plunger alsohaving, as'a continuation of its opposite side, a flexible shank 17,said shank being somewhat shorter than the said other shank, andterminating rearwardly in a click or detent 18, and an outer casingcomposed of a forward section 19 and a rear or breech section 20. Thesaid forward section has a tapered writing tip 21 and a terminationrearwardly of a shoulder 22 and a shank 23. Said forward section has aflange chamber 24 and a slide chamber 25, an inturned flange 30 beinginterposed between the said chambers. The breech section of the outercasing is a tubular member having its forward end or mouth 26 open forthe reception of the shank 23 of the forward section of the casing. Therear end of the breech section is closed exce t for the breechway 13.There is a flange c amber 27 in'the breech section, and between the sandflange chamber 27 and the main chamber 28 there 1s an inturned flange29.

More articularly described, the barrel 1 fits slide 1 into the propellertube 8, and the said arrel. The operating position of the barrel in itsrelation to the operating position of the propeller tube is clearly setorth in Fig. 5, in which it will be noted that the longitudinal slot 2of the barrel comes directly opposite the plurality of perforations 10of the propeller tube, and that the slot 9 of the propeller tube comesdirectly 0 posits the multiplicity of perforations 3 of t e barrel.Reference to the cross section drawin Fig. 6 will provide a clearunderstanding 0 the ositional relationship of the perforations 3 o thebarrel to the perforations 10 of the propeller tube. It will be apparentto anyone versed in the art that the series of stops or ribs 33 and theintervening perforations 10 constitute a ratch along one side of thepropeller tube, and, likewise, that the series of stops or ribs 34 andthe intervening perforations 3 constitute a ratch along one side of thebarrel.

The propeller tube ratch actuates the detent 16 and the shank 15 of thelonger when the propeller tube is subjects to a reciprocal sliding, or apull and push operation. The detent 18, controlled by the shank 17, actsforwardly upon the ratch of the barrel.

The plun er '14 is of an outside diameter which permlts of its beinginserted slidably into the barrel through the breechway 13. The writinglead is inserted into the plunger at the open or month end 31 of theplunger.

The lead and plunger, when so combined,-

form a sort of a cartridge, which is'inserted into the barrel throu hthe breechway 13. When the plunger is fully inserted into the breechway,the detent 18 engages in a perforation 3, thereby making it impossiblefor the plunger to slide rearward or to be withdrawn from the breechway.

To operate the pencil, that is, to propel the lead forward, thepropeller tube is drawn rearward as far as the slide chamber 25 willpermit, as indicated by the broken line 32. As the propeller tube thusslides rearward over the barrel, a stop 33 slidably engages the detent16, thereby flexing inwardly the shank 15, causing the stops 33 of theratch to pass over the detent 16 which is held lon tudinally stationaryin the barrel by the etent 18 engaging in a perforation 3. The

pencil is now open. When the propeller tube 1s pushed forward over thebarrel to its forwardmost, or closed, position, as indicated by .wardmovement of the plunger, as it is propolled by the ratch of thepropeller tube,

causes the shank 17 to flex inwardly, thereby permitting the detent 18to pass frictionally a over the stops of the barrel ratch. said rope lertube slides operatively over the It will be noted, by reference to Fig.6, that the plunger is kept from turning, so that the detents 16 and 18are held in alignment with the ratches respectively of the propellertube and of the barrel, by the slidable contact of the sides of thedetent 16'with the sides of the barrel slot 2, and that once fullyinserted into the barrel through the breechway, the

plunger can move only in one direction, that direction being forward ortoward the writing tip of the pencil.

When the writing lead is exhausted,the forward end of the plungerprotrudes from the writing tip, whence it is withdrawn. Another lead isinserted, as described, propelled forward until the writing end of thelead protrudes the desired length from the writing ti and the pencil isagain ready for use.

Re erring again to the outer casing, it will be noted that the flangecap 12 of the propeller tube occupies the flange chamber 27 of thebreech section of the outer casing, said flange cap being held immovablelongitudinally by the inturned flan e 29. I preferably use this means toancl a or the propeller tube to and within the breech section of the;

outer casing with which it co-operates, the combination of the propellertube and the breech section of the casing being, in eflect, an o eratingunit. When the propeller tube is su jected to a reciprocal slidinoperation over the barrel, as described, the reech section of the outercasing slides reciprocally over the shank 23 of the forward section ofthe outer casing. This is indicated by the broken line 35, the forwardend of the breech section coinciding with the shoulder 22 of the forwardsection when the pencil is closed and ready for use.

' The flange 11 of the propeller tube slides frictionally in thelongitudinal chamber 26 of the forward section of the outer casing,

when the lead is propelled forward, as indland the walls of its chamberto permit of the flange being rotated within 1ts chamber. Thisprecaution prevents the warpin or breaking of any of the several parts 0the pencil should an effort be made, by anyone unfamiliar with the pulland push operation of the pencil, to rotate the propeller tube, anoperation common to practically all magazine pencils.

, While I have illustrated and-described the preferred form ofconstruction for carrying my invention into effect, this is capable ofvariation and modification without departing from the spirit of theinvention. I, therefore, do not wish to be limited to the precisedetails of construction set forth, but desire to avail myself of suchvariations and modifications as come within the scope of the appendedclaim.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

A magazine pencil comprising, in combination, a tubular plunger havingan open forward end for the insertion of a writing lead, and parallelrear-extending flexible shanks, said shanks terminating in oppositelydirected detents; a barrel having a multiplicity of perforations alongone side for engaging said plunger, and along its opposite longitudinalse ment a slot for operatively supporting sai plunger; a propeller tubehaving a plurality of perforations along one side for actuating saidplunger, said propeller tube surrounding and sliding operatively oversaid barrel and said plunger; an outer casing having a slidable breechsection, said breech section having a breechway in the end thereof forthe inward passage of a writing lead; and means for fastening saidpropeller tube and said barrel to, and within, said outer casing, allsubstantially as set forth.

In testimony whereof I hereto fix my signature.

FRANK E. MAYOL.

